1 long green chilli, deseeded and finely chopped (optional)
40g/1陆oz fresh root ginger, peeled and finely grated
1 red pepper, deseeded and cut into roughly 3cm/1录in chunks
1 green pepper, deseeded and cut into roughly 3cm/1录in chunks
4 spring onions, green tops only, finely sliced
400g tin chopped tomatoes
4-5 tbsp non-dairy yoghurt, ideally unsweetened coconut milk yoghurt
1 tsp caster sugar
录 tsp hot chilli powder (optional)
2 tsp ground cumin
2 tsp garam masala
1 tsp flaked sea salt
6 boneless, skinless chicken thighs, trimmed of excess fat and quartered